Large-section rectangular pipe jacking machine jacking structure with external brim and construction method thereof

Abstract

The invention discloses a large-section rectangular pipe jacking machine jacking structure with an external hat brim. The large-section rectangular pipe jacking machine jacking structure comprises a rectangular pipe jacking machine, the external hat brim, sliding seals, a breast plate and a jack pushing stop block, wherein the external hat brim is arranged on the outer side of a pipe jacking machine shell, the external hat brim is of an inverted-U-shaped structure, the front end of the external hat brim is obliquely arranged and attached to a side wall enclosure structure of an entrance and exit of a subway station, the rear end of the external hat brim extends to the rear end of the pipe jacking machine shell, a plurality of sliding seals are arranged at the front end and the rear end of the joint of the external hat brim and the pipe jacking machine shell along the whole length of the external hat brim, the breast plate is arranged in the pipe jacking machine shell, a pipe jacking machine cutter head is arranged on the outer side of the breast plate, a jacking jack is arranged on the inner side of the breast plate, the pipe jacking machine shell is located on the inner side of the breast plate and provided with a plurality of through holes close to the breast plate, and the jack pushing stop block is arranged on the inner side of the breast plate and is connected with the end part of a piston rod of the pushing jack.

Description

technical field [0001] The invention relates to the technical field of pipe jacking construction, in particular to a large-section rectangular pipe jacking machine jacking structure with an external brim and a construction method thereof. Background technique [0002] With the acceleration of urbanization, rail transit has become one of the important means to solve urban traffic congestion. Major cities are continuing to promote subway construction, and mechanized construction has gradually become the mainstream of subway construction methods, especially in recent years. Pipeline construction has become a new hot spot. [0003] At present, subways are often built in prosperous urban areas, especially at the intersections of roads. Due to external factors such as land acquisition and demolition, the construction of subway station entrances and exits often lags behind the construction of the main body of the station. When the pipe jacking method is adopted for the entrance an...

AI Technical Summary

Problems solved by technology

Due to the irregular horizontal or vertical oblique intersection between the pipe jacking starting work well and the pipe jacking axis, and the horizontal or vertical angle is between 0° and 90°, when the rectangular pipe jacking machine jacks into the side wall of the receiving end, the rectangular pipe jacking machine The cutter head cannot touch the side wall of the receiving end in front, only one corner touches the side wall of the receiving end, and a wedge-shaped soil body with a certain thickness is formed between the side wall of the receiving end and the cutter head of the rectangular pipe jacking machine. If the wedge-shaped soil body is not passed through Reinforcement, when the rectangular pipe jacking machine receives and disassembles blind holes, it is very easy to cause soil collapse, which in turn affects the operation safety of existing subway stations and entrances and exits

[0004] For example, patent 202010019058.6 discloses a construction method using rectangular pipe jacking for the entrance and exit passages of subway stations. Shaft receiving method, patent 201910443104.2 discloses a receiving method for the entrance and exit passages of subway stations during the construction and operation of rectangular pipe jacking machines. Although this patent uses a receiving method without receiving shafts, the patent is that the front of the rectangular pipe jacking machine vertically contacts the side of the station The wall received disintegration under the condition that the pipe jacking axis and the station side wall are horizontally and vertically obliquely intersected

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